gauge wiring power source?

i bought a reverse glow gauge displays for my teg, but it does not come w/ any wiring diagram. it have 2 wires for the power supply, the black to car's body, but the red, the power supply, does anyone know which wire do i tap in for power source from the 4 wiring harnesses coming into the main gauges pod? thanx in advance.

/d

go to www.teamintegra.net and register if you haven't already, look through the articles and they have one for putting in reverse glow gauges. very helpful.